According to a report in the Financial Times, Google are phasing out the use of Microsoft's Windows within the company because of security concerns. Citing several Google employees, the FT report reports that new hires are offered the option of using Apple Mac systems or PCs running Linux. The move is believed to be related to a directive issued after Google's Chinese operations were attacked in January. In that attack, Chinese hackers took advantage of vulnerabilities in Internet Explorer on a Windows PC used by a Google employee and from there gained deeper access to Google's single sign on service.

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You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump